An atom can get the energy that moves an electron to a higher energy level by:
A) absorbing a photon of electromagnetic radiation.
B) preventing collisions with other atoms.
C) moving the electron to a tightly bound level.
D) transferring the electron to the ground state.
A
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Recently discovered brown dwarfs have spectra similar to cool O-type stars
a. True b. False Indicate whether the statement is true or false
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A. 1.6 × 1013 N B. 4.4 × 1013 N C. 1.0 × 1014 N D. 2.0 × 1014 N E. 4.0 × 1014 N
The evolution of a protostar slows significantly as it approaches the main sequence
Indicate whether the statement is true or false
The locking mechanism for the seatbelt of a car makes use of the fact that the apparent vertical direction (i.e. the direction in which a plumb bob hangs) changes with the car's deceleration
In a certain collision, the deceleration of a car is 5.00 g. What angle does the apparent vertical make with the true vertical?